QChart柱状图、折线图和散点图图像及X轴刷新
使用QChart需要在*.pro中添加
QT += charts在*.h文件中添加使用Qt中预先定义好的宏：
[cpp] view plain copy
QT_CHARTS_BEGIN_NAMESPACE
class QChartView;
class QChart;
QT_CHARTS_END_NAMESPACE
QT_CHARTS_USE_NAMESPACE 或者使用
- using namespace QtCharts
柱状图：
mainwindow.h
#include
#include
#include
#include
//#include
//#include
//#include
// #include
#include
#include
// #include
// #include
#include
#include
#include
#include
#include
QT_CHARTS_BEGIN_NAMESPACE
class QChartView;
class QChart;
QT_CHARTS_END_NAMESPACE
QT_CHARTS_USE_NAMESPACE
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private:
void initChart();
private slots:
void sltpushButton();
void sltpushButton_2();
void sltpushButton_3();
void sltCategoriesChanged();
private:
Ui::MainWindow *ui;
QChart* m_typeChart;
QChartView* m_typeView;
QBarCategoryAxis* m_typeAxis;
QValueAxis* m_typeAxisY;
QBarSeries* m_barSeries;
QBarSet* m_barSet;
};
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
initChart();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::initChart()
{
m_typeChart = new QChart();
m_typeChart->setAnimationOptions(QChart::SeriesAnimations);//动画效果
m_barSet = new QBarSet("eg");//创建条，可以创建多个
m_barSet->setLabelColor(QColor(0,0,0));
m_barSeries = new QBarSeries(m_typeChart);
m_barSeries->setLabelsVisible(true);//判断是否在图柱上显示数值
m_barSeries->setLabelsPosition(QAbstractBarSeries::LabelsOutsideEnd);//在柱上显示数值方式
m_typeChart->addSeries(m_barSeries);
m_typeChart->setTitle("XXXX");
m_typeAxis = new QBarCategoryAxis();//创建X轴
m_typeChart->createDefaultAxes();
m_typeChart->setAcceptTouchEvents(true);
m_typeChart->setAxisX(m_typeAxis, m_barSeries);
m_typeAxisY = new QValueAxis;//创建Y轴
m_typeAxisY->setRange(0, 10);//显示数值范围
m_typeAxisY->setTickCount(10); //设置多少格
// m_typeAxisY->setLabelFormat("%u"); //设置刻度的格式
// m_typeAxisY->setTitleText("AxisY"); //设置Y轴标题
// m_typeAxisY->setGridLineVisible(true); //设置是否显示网格线
m_typeAxisY->setMinorTickCount(5); //设置每格小刻度数目
m_typeChart->setAxisY(m_typeAxisY, m_barSeries);
m_typeChart->legend()->setVisible(true);
m_typeChart->legend()->setAlignment(Qt::AlignBottom);
m_typeChart->legend()->hide();
m_typeView = new QChartView();
m_typeView->setChart(m_typeChart);
m_typeView->setRubberBand(QChartView::RectangleRubberBand);//拉伸效果
m_typeView->setRenderHint(QPainter::Antialiasing);
m_typeView->chart()->setTheme(QChart::ChartThemeBrownSand);
QPalette pal = window()->palette();
pal.setColor(QPalette::Window, QRgb(0x9e8965));
pal.setColor(QPalette::WindowText, QRgb(0x404044));
window()->setPalette(pal);
ui->widget->layout()->addWidget(m_typeView);
sltpushButton();
connect(ui->pushButton_2, SIGNAL(clicked()), this, SLOT(sltpushButton_2()));
connect(ui->pushButton_3, SIGNAL(clicked()), this, SLOT(sltpushButton_3()));
connect(m_typeAxis, SIGNAL(categoriesChanged()), this, SLOT(sltCategoriesChanged()));//QValueAxis改变是会触发信号
}
void MainWindow::sltpushButton()
{
*m_barSet << 1 << 2 << 3 << 4 << 5 << 6;
m_barSeries->append(m_barSet);
QStringList categories;
categories << "Feb" << "Mar" << "Apr" << "May" << "Jun" << "Jan";
m_typeAxis->append(categories);//
}
void MainWindow::sltpushButton_2()
{
m_typeAxis->clear();
}
/*****************不适用触发信号barSeries不刷新 eg.sltpushButton_3*******************/
void MainWindow::sltpushButton_3()
{
// m_typeAxis->clear();
// m_barSeries->clear();
// m_barSet = new QBarSet("eg");
// m_barSet->setLabelColor(QColor(0,0,0));
// *m_barSet << 3 << 4 << 5 << 6<< 1 << 2;
// m_barSeries->append(m_barSet);
// QStringList categories;
// categories << "A" << "B" << "C"<< "D" << "E" << "F";
// m_typeAxis->append(categories);
}
void MainWindow::sltCategoriesChanged()
{
m_barSeries->clear();//因为下边会重新添加新的X轴所以会触发两次因此需要清空QBarSeries
m_barSet = new QBarSet("eg");//需要重新创建一个柱
m_barSet->setLabelColor(QColor(0,0,0));
*m_barSet<< 2 << 3 << 4 << 5 << 6<<1;
m_barSeries->append(m_barSet);
QStringList categories;
categories << "1" << "2" << "3" << "4"<< "5"<< "6" ;
m_typeAxis->append(categories);
}代码下载http://download.csdn.net/download/u010304326/10227887
接线图结合散点图
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include
#include
//#include
//#include
//#include
#include
#include
#include
// #include
// #include
#include
#include
#include
#include
#include
QT_CHARTS_BEGIN_NAMESPACE
class QChartView;
class QChart;
QT_CHARTS_END_NAMESPACE
QT_CHARTS_USE_NAMESPACE
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private:
void initline();
private slots:
void sltpushButton();
void sltpushButton_2();
void sltpushButton_3();
void sltCategoriesChanged();
private:
Ui::MainWindow *ui;
QChart* m_chart;
QLineSeries* m_lineSeries;
QScatterSeries* m_scatterSeries;
QBarCategoryAxis* m_axis;
QValueAxis* m_axisY;
QChartView* m_chartView;
QList<int> m_list;
};
#endif // MAINWINDOW_Hmainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
initline();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::initline()
{
m_chart = new QChart();
m_chart->setAnimationOptions(QChart::SeriesAnimations);
m_lineSeries = new QLineSeries(m_chart);//创建折线
m_lineSeries->setPen(QPen(Qt::lightGray,2,Qt::SolidLine));
m_lineSeries->setColor(QColor(248, 167, 0));
// m_lineSeries->setPointLabelsVisible(true);
m_scatterSeries = new QScatterSeries(m_chart);//创建散点
m_scatterSeries->setMarkerShape(QScatterSeries::MarkerShapeRectangle);//设置散点样式
m_scatterSeries->setMarkerSize(15);//设置散点大小
m_chart->addSeries(m_lineSeries);
m_chart->addSeries(m_scatterSeries);
m_chart->setTitle("xxxx");
*m_lineSeries << QPointF(0, 5) << QPointF(3, 0) << QPointF(7, 6) << QPointF(9, 7) << QPointF(10, 6);
*m_scatterSeries<< QPointF(0, 5) << QPointF(3, 0) << QPointF(7, 6) << QPointF(9, 7) << QPointF(10, 6);
QStringList list;
list<<"0"<<"1"<<"2"<<"3"<<"4"<<"5"<<"6"<<"7"<<"8"<<"9"<<"10"<<"11"<<"12"<<"13";
m_axis = new QBarCategoryAxis();
m_axis->append(list);//
m_chart->createDefaultAxes();
// m_chart->setAcceptHoverEvents(true);
m_chart->setAcceptTouchEvents(true);
m_chart->setAxisX(m_axis, m_lineSeries);
m_chart->setAxisX(m_axis, m_scatterSeries);
m_axisY = new QValueAxis;
m_axisY->setRange(0, 10);
// m_axisY->setLabelFormat("%u"); //设置刻度的格式
// m_axisY->setGridLineVisible(true);
m_axisY->setTickCount(10); //设置多少格
m_axisY->setMinorTickCount(5); //设置每格小刻度线的数目
m_chart->setAxisY(m_axisY, m_lineSeries);
m_chart->setAxisY(m_axisY, m_scatterSeries);
m_chart->legend()->setVisible(true);
m_chart->legend()->setAlignment(Qt::AlignBottom);
m_chart->legend()->hide();
m_chartView = new QChartView(m_chart);
m_chartView->setRenderHint(QPainter::Antialiasing);
m_chartView->chart()->setTheme(QChart::ChartThemeBrownSand);
QPalette pal = window()->palette();
pal.setColor(QPalette::Window, QRgb(0x9e8965));
pal.setColor(QPalette::WindowText, QRgb(0x404044));
window()->setPalette(pal);
ui->widget->layout()->addWidget(m_chartView);
m_list<<2<<3<<5<<4;
connect(ui->pushButton_2, SIGNAL(clicked()), this, SLOT(sltpushButton_2()));
connect(ui->pushButton_3, SIGNAL(clicked()), this, SLOT(sltpushButton_3()));
connect(m_axis, SIGNAL(categoriesChanged()), this, SLOT(sltCategoriesChanged()));
}
void MainWindow::sltpushButton()
{
}
void MainWindow::sltpushButton_2()
{
m_axis->clear();
}
void MainWindow::sltpushButton_3()
{
}
void MainWindow::sltCategoriesChanged()
{
m_lineSeries->clear();
m_scatterSeries->clear();
for(int i = 0 ; i<m_list.count(); i++)
{
m_lineSeries->append(i,m_list.at(i));
m_scatterSeries->append(i,m_list.at(i));
}
QStringList categories;
categories << "A" << "B" << "C"<< "D" << "E" << "F";
m_axis->append(categories);//
}
代码下载：http://download.csdn.net/download/u010304326/10227980